Hi googabin! I am a new nurse and also a parent of a frequent flyer to PICU......So I have the other side so to speak..lol..I am a home care nurse right now until I can get my foot in the door of a hospital.
I have great advice (I hope!

) from the parent/patient side of the coin......
My child is severly disabled and trached/vented ( vented last 2 years)
I guarantee you will have patients that are very very well known to the PICU...as my child & I am......to the point that you will know all the meds that kid is on without asking .....because you have cared for them so many times....
Words of advice from me.....don't EVER assume the parents don't have a clue or are in "denial" .....I had that done to me about 5 years ago by a highly educated ICU nurse & a critical care doc ......who knew me & my child all of 5 days (this wasn't our regular PICU , as ours had no beds open).....I just casually mentioned that I've been living this for many years so denial is hardly a description.......& it's very inappropriate as well.
Listen to the parents...they know their kids better than anyone else.
Don't ever judge a parent who isn't sitting at their kids bedside 24/7.........that may be the only break that parent gets from caring for their kid.....EVER. (trust me....personal experience)
Never assume because a kid can't communicate that they have no idea they even exist..........Many kids who are dd know whats going on around them but just can't openly communicate.
Just be there for the parents, even if it means rubbing their shoulder for a minute with your hand to let them know you are there for them.
I know we all judge at some point....heck I am even guilty of it myself...we are only human.....but just because they may not do something "by the book" or the way you would or "were taught in nursing school" doesn't make it bad or wrong.
Above all never assume anything .......I have this happen all the time......mostly by nurses & doctors.....that my kid lives in a facility......and when I casually say she lives home & always has.....I get a look like I have 10 heads attached to me.
Actually a week ago my child went for an endoscopy at the hospital we always go to...a big teaching one, and the nurse who 1st saw us in the holding area ( she was a grouch anyway) when we got there was just about yelling at me for "the paperwork from the facility" and the look on her face was like nothing I have ever seen before........ and I just asked what paperwork......... and she kept very loudly saying from the facility......and when I said she doesn't live in a facility...alll she did was hymn & haw when I was giving her all my kids meds, dosages etc....without even looking at a paper just rattling them off......doses, times, route etc......she stopped me 1/2 way through saying ok I have enough........I think she got my point.
Also another time I took her for a test & the nurse actually asked me (because our homecare nurse was with us) if I was learning how to take care of her (because I mentioned at the time I was going to nursing school when she asked what I did for work)...I looked at her as if to say "are you serious"...................
So I could go on & on & on......
Also you may see a miracle or two........my daughter is one....witnessed by all PICU staff..and even the doctor who had her literally looked up to the ceiling & said " someone or something of a higher power is watching over her because I have without a doubt witnessed a miracle with your daughter"
You see the summer of 2004 my daughter was literally dying and I mean literallly...from septic shock/multi organ failure etc ...you name it.......and she pulled through......even when we ended up just doing comfort care as nothing more could be done.......4 days 24/7 by her bedside & she miraculously pulled through.
To this day they talk about it........
So......I wish you luck on your PICU adventure........you will see many things good & bad.........and you'll be great! Please tell us all how it's going....I want to actually work in PICU myself at the hospital I usually take my child too because I am in awe at the way they work together & what incredible nurses they really are............ Good Luck!!!! Enjoy your new position!